The formatting is mangled on my phone, but if I am reading it correctly, you have set Target Ratio to 4.0. This means you have told the balancer that this pool will occupy 4x the space of your whole cluster, and to optimize accordingly. This is naturally a problem. Setting it to 0 will clear the setting and allow the autobalancer to work.
On Thu., Oct. 24, 2019, 5:18 a.m. Lars Täuber, <taeuber@xxxxxxx> wrote:
This question is answered here:
https://ceph.io/rados/new-in-nautilus-pg-merging-and-autotuning/
But it tells me that there is more data stored in the pool than the raw capacity provides (taking the replication factor RATE into account) hence the RATIO being above 1.0 .
How comes this is the case? - Data is stored outside of the pool?
How comes this is only the case when the autoscaler is active?
Thanks
Lars
Thu, 24 Oct 2019 10:36:52 +0200
Lars Täuber <taeuber@xxxxxxx> ==> ceph-users@xxxxxxx :
> My question requires too complex an answer.
> So let me ask a simple question:
>
> What does the SIZE of "osd pool autoscale-status" tell/mean/comes from?
>
> Thanks
> Lars
>
> Wed, 23 Oct 2019 14:28:10 +0200
> Lars Täuber <taeuber@xxxxxxx> ==> ceph-users@xxxxxxx :
> > Hello everybody!
> >
> > What does this mean?
> >
> > health: HEALTH_WARN
> > 1 subtrees have overcommitted pool target_size_bytes
> > 1 subtrees have overcommitted pool target_size_ratio
> >
> > and what does it have to do with the autoscaler?
> > When I deactivate the autoscaler the warning goes away.
> >
> >
> > $ ceph osd pool autoscale-status
> > POOL SIZE TARGET SIZE RATE RAW CAPACITY RATIO TARGET RATIO BIAS PG_NUM NEW PG_NUM AUTOSCALE
> > cephfs_metadata 15106M 3.0 2454G 0.0180 0.3000 4.0 256 on
> > cephfs_data 113.6T 1.5 165.4T 1.0306 0.9000 1.0 512 on
> >
> >
> > $ ceph health detail
> > HEALTH_WARN 1 subtrees have overcommitted pool target_size_bytes; 1 subtrees have overcommitted pool target_size_ratio
> > POOL_TARGET_SIZE_BYTES_OVERCOMMITTED 1 subtrees have overcommitted pool target_size_bytes
> > Pools ['cephfs_data'] overcommit available storage by 1.031x due to target_size_bytes 0 on pools []
> > POOL_TARGET_SIZE_RATIO_OVERCOMMITTED 1 subtrees have overcommitted pool target_size_ratio
> > Pools ['cephfs_data'] overcommit available storage by 1.031x due to target_size_ratio 0.900 on pools ['cephfs_data']
> >
> >
> > Thanks
> > Lars
> > _______________________________________________
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> > To unsubscribe send an email to ceph-users-leave@xxxxxxx
>
>
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